Electrical forge



(No Model.) 4 Sheets-Sheet 1.

G. D. BURTON.

ELEGTRIGAL PORGB.

No. 475,178. Patented May 17,1892.

TH: Nonms c.

(No Model.) 4 Sheets-Sheet G. D. BURTON.

ELETRIAL FORGE.

No. 475,1'78. Patented May .17, 1892.

WITH EEEEE a; M-

(No Model.) 4 Sheets-Sheet 3.

G. D. BURTON.

ELEGTRIGAL PURGE.

No. 475,1'78. Patented May1'7,1892.

4 Sheets-Sheet 4.

(No Model.)

G. D. BURTON.

' BLEGTRIOAL PORGE. No. 475,178. Patented May 1'7,-189Z.

WrriJEssEE:

UNITED STATES PATENT OFFICEo GEORGE D. BURTON, OF BOTON, MASSACHUSETTS, ASSIGNOR TO THE ELECTRICAL FORGING COMPANY, OF MAINE.

ELECTRICAL FORGE.

SPECIFIGATION forming part of Letters Patent No. 475,178, dated May 17, 1892.

Application filed May 6, 1891. Serial No. 391,'705. (No model.)

TO all whom it may conoern: mediate arms may be adjusted at any angle Be it known that I, GEORGE D. BURTON, of in the same plane after loosening' the clamp- Boston, in the county of Sufolk, in the State ing-nuts 13, and may be held in the desired of Massachusetts, have invented certain new position by tightening` said nuts, and the elecand useful Improvements in Electric Forges, trode-arms may be adjusted parallel with each of which the following is a specification. other by the clamping-nuts 33.

This invention relates to an electric forge The outer ends of the electrode-arms are for heating bars of metal for forging or temprovided with clamping-jaws for holding the pering purposes. opposite ends of the bar of metal to be heated.

ro The object of the :invention is to provide an Each pair of clamping-jaws comprises a fixed electric forge in which the electrodes for supjaw 44, coustituting` an extension of the elecporting thebars to be heated may be adjusted trode-arm, and a movable jaw 45, hinged to with facility to receive bars of different said arm. The jaws are provided on theirinlengths and readily opened and closed for rener faces with notches 46 of different shapes 15 ceiving and discharging a bar. and sizes to receive bars of various cross-sec- Figure 1 of the accompanying drawings tions and diameters. The fixed and hinged represents a front elevation of this improved jaws are also provided at their outer ends with electric forge attached to an electric-current ears 47, and an adjusting-screw 48 passes converter, and the same figure may also repthrough said ears and locks the jaws. This zo resent a plan of the electric forge when arolamping-sorew has an insnlated head 49. ranged in horizontal position. Fig. 2 repre- The hinged jaws are also provided with insents a plan view thereof, and it may also repsulated handles 50 for Opening and closing resent a side elevation when the forge is dsthem. posed in a horizontal position. Fig. 3 repre- The means for pressing` the jaws toward 25' sents a plan View of this improved electric each other to clampabar may consist of links forge disposed in horizontal position, one of 80, pivoted to the outer end of one of the jaws, the electrode-arms being swung on a universal and a toothed wheel orsegment 8l,journaled joint. Fig. 4 represents a side elevation of in said links and pivoted with an actnating the forge illustrated in Fig. 3. Fig. 5 reprehandle-lever 82. The companion jaw is pro- 30 senis a portion of one pair of the electrodevided at its outer end with teeth 83, which jaws provided with a clamping;` device of a are engaged by said wheel or segment to close different species at their outer ends. Fig. 6 or clamp the jaws. represents a similar view showing` another In Fig. 4 the forge is illustrated in horizonspecies of clamp. tal position, and one of the ele-otrodes is con- 3 5 Similar numerals of reference indicate oornected with the current through two intermeresponding parts in the different figures. diate arms, a second intermediate arm 00 be- Two fixed braokets 10 are bolted or othering interposed between the intermediate arm wise attached to or connected with the posi- 31 and the eleotrode-arm 41. The arm 60 is tive ring 20 of an electric converter, and simihinged to the outer end of the arm 31, and the 40 lar brackets 11 are fixed to the negative ring electrode-arm 41 is connected with the outer 21 of said converter. Bolts 12 pass through end of the arm 60 by a universal joint Gl. said brackets, and clamping-nuts 13 on said (Shown in the form of a ball and socket.) bolts cause the brackets of each pair to spring The ball is split and provided With ears 62,

1 toward each other, forming clamping-jaws. through which a bolt 63 passes. A clamping- 45 Two intermediate arms 30 and 31 are pivoted screw in said bolt serves to close the socket at their inner ends on said bolts between said in the ball and fixes the electrode-arm in the jaws or brackets. Two electrode-arms 40 and desired position. The second intermediate 41 are hinged at their inner ends to the outer arm 00 and the universal joint enable the elecends of said intermediate arms by means of trode-arm 41 to be elevated and adj usted on 50 bolts 32,11aving clamping-nuts 33. The interthe same plane with the electrode-arm 40. A Ioo beneh 70 or benches may be placed under the eleotrode-arms to aid in supporting,` them.

In the use of the apparatus the hinged jaWs 45 are swung open,and the ends of the bar to be heated placed in the proper notches in the fixed eleotrode-jaws 44. The hinged jaws 45 are then closed and clamped. The current from the positive ring of the electrc converter passes through one of the bracket-supports 10 into and through the intermediate arm 30, and thence into the electrode-arm 40, whence it enters one end of the bar to be heated and passes therethrough to the negative electrodearm 41,thence through the intermediate arm 31 and through the other braeket-support 11 to the negative ring 21 of the current-converter. The current is allowed to pass through the bar for a number of seconds until it is properly heated, and then it may be turned off or broken by opening'the hinged jaws and discharging the bar.

Then the forge is disposed in horizontal position, the elamping` or looking devices at the ends of the elamping-jaws of the electrodes may be dispensed With.

The electrode-arms are composed wholl y or in part of copper, or other suitable conductive material.

1 claim as my inventionv 1. In an eleotric forge, the combination of an eleotrie-current converter, two pivoted intermediate arms separately connected with opposite terminals thereof, means for adjusting said arms on their pivots, a second intermediate arm pivotally conneeted with one of the first intermediate arms, an electrode-arm connected to the outer end of said second intermediate arm by a universal joint, and an electrode-arm connected With the outer end of one of the first intermediate arms.

2. In an electrio forge, the combination of an electric-current converter provided With two rings constituting the positive and negative poles thereof, two pivoted intermediate arms monnted, respectvely, on said Tings, means for adjusting said arms on their pivots, two electrode-arms pivoted to said intermediate arms, and means for adjusting said arms on their pivots.

In testimony Whereof I have signed my name to this specifieation in the presence of two snbsoribing witnesses.

GEO. D. BURTON.

lVitnesses:

F. O. SoMEs, CHESTER MARR. 

